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Doppler imaging an X-ray flare on the ultrafast rotator BO Mic - A contemporaneous multiwavelength study using XMM-Newton and VLT
U. Wolter, J. Robrade, J. H. M. M. Schmitt +1
We present an analysis of contemporaneous photospheric, chromospheric and coronal structures on the highly active K-dwarf star BO Mic (Speedy Mic). We localize a moderate flare in…
X-rays from RU Lupi - Accretion and winds in CTTS
J. Robrade, J. H. M. M. Schmitt
Using three XMM-Newton observations we study the X-ray emission of RU Lup, a accreting and wind-driving CTTS. In comparison with other bright CTTS we study possible signatures of a…
X-ray emission from classical T Tauri stars: Accretion shocks and coronae?
H. M. Guenther, J. H. M. M. Schmitt, J. Robrade +1
Classical T Tauri stars (CTTS) are surrounded by actively accreting disks. According to current models material falls along the magnetic field lines from the disk with more or less…
X-ray activity cycles in stellar coronae
J. Robrade, J. H. M. M. Schmitt, A. Hempelmann
We present updated results from the ongoing XMM-Newton monitoring program of moderately active, solar-like stars to investigate stellar X-ray activity cycles; here we report on the…